A ventilation device for environmental protection system

Abstract

The invention discloses a ventilation device for an environmental protection system, comprising a volute and an impeller, wherein the impeller is located in the volute, and the volute comprises an inlet plate (1), a back plate, a volute plate (2), and an outlet plate (3), characterized in that a guide plate (6) is arranged on one side of the air outlet (5), and the guide plate is arranged close to the tongue of the volute. The ventilator can reduce turbulence at the outlet of the ventilator and reduce noise through the design of the guide plate structure.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying equipment for environmental protection systems, industrial ventilation and air exchange, and is a ventilation device for environmental protection systems, and specifically relates to a ventilator for industrial ventilation. Background Art

[0002] like Figure 1 As shown, a ventilator for industrial ventilation includes a volute and an impeller. The impeller is located in the volute. The volute includes an inlet plate, a back plate, a volute plate, and an outlet plate. The volute plate is connected between the inlet plate and the back plate. An air inlet is provided on the inlet plate. The outlet plate is connected to the outlet of the volute. An air outlet is provided on the outlet plate. The airflow at the outlet hits the outlet plate due to turbulence, generating a large noise. The existing ventilator structure has the problem of large noise due to turbulence, and the performance of the ventilator is reduced accordingly. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies in the prior art and to provide a fan for industrial ventilation, which can reduce turbulence at the fan outlet and reduce noise through the design of the guide plate structure.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A ventilator for industrial ventilation, comprising a volute and an impeller, wherein the impeller is located in the volute, the volute comprising an inlet plate (1), a back plate, a volute plate (2), and an outlet plate (3), the volute plate being connected between the inlet plate and the back plate, an air inlet (4) being arranged on the inlet plate, the outlet plate being connected to the outlet of the volute, and an air outlet (5) being arranged on the outlet plate, characterized in that a guide plate (6) is arranged on one side of the air outlet (5), and the guide plate is arranged close to the tongue of the volute.

[0006] Furthermore, the guide plate (6) is a curved arc-shaped guide plate, and a plurality of grooves (7) are provided on the guide plate, and the plurality of grooves are arranged along the length direction of the guide plate.

[0007] Furthermore, the groove (7) extends along the airflow direction, and the groove is an arc-shaped or semicircular groove.

[0008] Furthermore, the guide plate (6) is a curved arc-shaped guide plate, and the guide plate has a plurality of protrusions (8) and recesses (9), the plurality of protrusions and recesses are arranged at staggered intervals, and the plurality of protrusions and recesses are arranged along the length direction of the guide plate.

[0009] Furthermore, the plurality of protrusions (8) and recesses (9) form a wave-like structure.

[0010] Furthermore, the guide plate (6) is a semicircular guide plate or an arc-shaped guide plate, one side of the guide plate is connected to one side of the air outlet, and the other side is connected to the surface of the outlet plate.

[0011] Furthermore, a noise reduction chamber (11) is formed between the guide plate (6) and the outlet plate, and one or more connecting holes (10) are provided on a side of the guide plate away from the air outlet, wherein the connecting holes are connected to the noise reduction chamber.

[0012] Furthermore, the fan is a centrifugal fan, the air outlet is a rectangular air outlet, and the guide plate is connected to the outlet plate.

[0013] The fan used for industrial ventilation can reduce turbulence at the fan outlet and reduce noise through the design of the guide plate structure, thereby improving the fan performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the volute structure of the prior art;

[0015] Figure 2 It is a schematic diagram of the volute structure of the present invention;

[0016] Figure 3 Schematic diagrams of the structure of the guide plate of the present invention; (a) a schematic diagram of the structure of the guide plate of the first embodiment, (b) a schematic diagram of the structure of the guide plate of the second embodiment;

[0017] Figure 4 It is a structural schematic diagram of the third embodiment of the guide plate of the present invention.

[0018] In the figure: inlet plate 1, volute plate 2, outlet plate 3, air inlet 4, air outlet 5, guide plate 6, groove 7, protrusion 8, recess 9, connecting hole 10, noise reduction chamber 11, airflow f. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 2-4As shown, a fan for industrial ventilation includes a volute and an impeller. The impeller is located in the volute. The volute includes an inlet plate 1, a back plate (not shown), a volute plate 2, and an outlet plate 3. The volute plate 2 is connected between the inlet plate 1 and the back plate. The inlet plate 1 is provided with an air inlet 4. The outlet plate 3 is connected to the outlet of the volute. The outlet plate 3 is provided with an air outlet 5. It is characterized in that a guide plate 6 is provided on one side of the air outlet 5, and the guide plate 6 is provided close to the tongue of the volute.

[0022] The fan is a centrifugal fan, the air outlet 5 is a rectangular air outlet, and the guide plate 6 is connected to the outlet plate 3. The length direction of the guide plate 6 is the axial direction (the direction of the rotation axis of the fan).

[0023] like Figure 3 As shown, the guide plate 6 is a curved arc-shaped guide plate, and a plurality of grooves 7 are arranged on the guide plate 6. The plurality of grooves 7 are arranged along the length direction (axial direction) of the guide plate 6, and the grooves 7 extend along the airflow direction / flow direction f, and the grooves 7 are arc-shaped / semicircular grooves. The design of the guide plate 6 structure can reduce turbulence at the outlet of the ventilator and reduce noise.

[0024] In another embodiment, the guide plate 6 is a curved arc-shaped guide plate, and the guide plate 6 has a plurality of protrusions 8 and recesses 9, which are arranged at staggered intervals, and are arranged along the length direction (axial direction) of the guide plate 6, and the plurality of protrusions 8 and recesses 9 form a wave-like structure. The design of the guide plate structure can reduce turbulence at the outlet of the fan and reduce noise.

[0025] In another embodiment, the guide plate 6 is a substantially semicircular guide plate or an arc-shaped guide plate, one side of the guide plate 6 is connected to one side of the air outlet 5, and the other side is connected to the surface of the outlet plate 3, and a closed noise reduction chamber 11 is formed between the guide plate 6 and the outlet plate 3, and a plurality of connecting holes 10 are provided on the side of the guide plate 6 away from the air outlet 5, and the plurality of connecting holes 10 are connected to the noise reduction chamber 11. The design of the guide plate structure can reduce the turbulence at the outlet of the ventilator and reduce the noise.

[0026] The fan used for industrial ventilation can reduce turbulence at the fan outlet and reduce noise through the design of the guide plate structure, thereby improving the fan performance.

[0027] The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A ventilation device for an environmental protection system, comprising a volute and an impeller, wherein the impeller is located in the volute, the volute comprising an inlet plate (1), a back plate, a volute plate (2), and an outlet plate (3), the volute plate being connected between the inlet plate and the back plate, the inlet plate being provided with an air inlet (4), the outlet plate being connected to the outlet of the volute, and the outlet plate being provided with an air outlet (5); Features: A guide plate (6) is provided on one side of the air outlet (5), the guide plate is provided close to the tongue of the volute, and the guide plate is connected to the outlet plate; The guide plate (6) is a semicircular guide plate or an arc-shaped guide plate, one side of the guide plate is connected to one side of the air outlet, and the other side is connected to the surface of the outlet plate; a noise reduction chamber (11) is formed between the guide plate (6) and the outlet plate, and one or more connecting holes (10) are provided on the side of the guide plate away from the air outlet, wherein the connecting holes are connected to the noise reduction chamber; the airflow at the air outlet is prevented from colliding with the outlet plate (3) due to turbulence, thereby generating a problem of relatively large noise.

2. A ventilation device for an environmental protection system according to claim 1, characterized in that: The ventilation device is a centrifugal fan.

3. A ventilation device for an environmental protection system according to claim 1, characterized in that: The air outlet is a rectangular air outlet.

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